Chapin
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Chapin bucket kits were developed by Richard Chapin of Chapin Living Water Foundation. This drip irrigation system consists of a 20-litre bucket mounted 1 m above the ground and 30 m of drip tape.
Construction, operations and maintenance
System components
- 20-litre bucket
- Timber and nail for bucket stand
- 2 pieces x 15 m drip tape
- 2 pieces x 1.5 m supply tubing
- Filter screen
- Washer
- 2 barb fittings
- Male adapter / Female adapter
Set up the system
- Prepare the field to be irrigated.
- Mount a 20 or 30-litre bucket (supplied by the farmer) with a 27mm hole (cut with a hole saw, on a drill, or by hand with a sharp knife, at the bottom of the bucket) and place it 1 m above the ground.
- Assemble the outlet from the bottom of the bucket by connecting the male adapter, rubber washer and female adapter.
- Install the filter screen at the bottom of the bucket.
- Install the two supply tubes running from the filter to the barb fittings.
- Connect the 15-m drip irrigation tape through the drip lock fittings.
How to adapt the system to more than two drip lines
The contents of a Chapin bucket kit enable one to set up 2 x 15 m (two drip lines each 15 m long) or, by using the submain pipe, the kit can be used for 4 rows 7.5 m long or 6 rows 5 m long, depending on the size of the garden. To do this you need the piercing tool, the submain (4.6 m long) and the 3-m micro-tubing included in the kit. This is achieved by:
- Cutting each drip tape twice (to make 4 lines), or three times (to make 6 lines);
- Cutting 4–6 pieces of the micro-tube, depending on the number of drip lines;
- Piercing a hole through the submain using the piercing tool;
- Connecting each drip line to the submain using the micro-tubes.
Manuals, videos, links
Acknowledgements
- Sijali, Isaya V. DRIP IRRIGATION: Options for smallholder farmers in eastern and southern Africa. RELMA, 2001.